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picture1_Methods Of Presentation Pdf 82172 | Polymers


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File: Methods Of Presentation Pdf 82172 | Polymers
polymers polymers see roe methods of x ray and neutron scattering in polymer science 2000 see roe methods of x ray and neutron scattering in polymer science 2000 semicrystalline poly ...

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      Polymers 
      Polymers 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
                 semicrystalline poly(3-hydroxybuyrate)
                 semicrystalline poly(3-hydroxybuyrate)
         note amorphous scattering region
         note amorphous scattering region
                              
      Polymers 
      Polymers 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
       Degree of crystallinity
       Degree of crystallinity
          Pattern consists of relatively sharp crystalline peaks +
          Pattern consists of relatively sharp crystalline peaks +
             amorphous scattering
             amorphous scattering
          Comparing intensities of the two ––> % crystallinity
          Comparing intensities of the two ––> % crystallinity
                              
      Polymers 
      Polymers 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
       Degree of crystallinity
       Degree of crystallinity
          Pattern consists of relatively sharp crystalline peaks +
          Pattern consists of relatively sharp crystalline peaks +
             amorphous scattering
             amorphous scattering
          Comparing intensities of the two ––> % crystallinity
          Comparing intensities of the two ––> % crystallinity
          Problems:
          Problems:
             small crystallite size broadens peaks
             small crystallite size broadens peaks
             extensive amounts of crystal imperfections
             extensive amounts of crystal imperfections
             thermal motion
             thermal motion
                              
      Polymers 
      Polymers 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
       Degree of crystallinity
       Degree of crystallinity
          Pattern consists of relatively sharp crystalline peaks +
          Pattern consists of relatively sharp crystalline peaks +
             amorphous scattering
             amorphous scattering
          Comparing intensities of the two ––> % crystallinity
          Comparing intensities of the two ––> % crystallinity
       Methods for separation:
       Methods for separation:
             guess
             guess
             measure 100% amorphous specimen
             measure 100% amorphous specimen
                              
      Polymers 
      Polymers 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
      (see Roe: Methods of X-ray and Neutron Scattering in Polymer Science (2000)) 
       Total scattering by amorphous & crystalline phases
       Total scattering by amorphous & crystalline phases
       Q is called the invariant           s = diffraction vector
       Q is called the invariant           s = diffraction vector
                              
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...Polymers see roe methods of x ray and neutron scattering in polymer science semicrystalline poly hydroxybuyrate note amorphous region degree crystallinity pattern consists relatively sharp crystalline peaks comparing intensities the two problems small crystallite size broadens extensive amounts crystal imperfections thermal motion for separation guess measure specimen total by phases q is called invariant s diffraction vector...

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